MESON Chess Problem Database

Problem Display
PID: 219452 (3K1k2/3B1N1r/3P2Q1/8/8/8/8/8 w - - 0 1)

Vaughan, Colin V

Schach-Report, 1989

3K1k2/3B1N1r/3P2Q1/8/8/8/8/8

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sg5?
      • threat
        • 2.Se6#
        • 2.Sxh7#
      • 1...Rg7
        • 2.Qe8#
      • 1...Rh1
        • 2.Se6#
        • 2.Qf7#
      • 1...Rh2
        • 2.Se6#
        • 2.Qf7#
      • 1...Rh3
        • 2.Se6#
        • 2.Qf7#
      • 1...Rh4
        • 2.Se6#
        • 2.Qf7#
      • 1...Rh5
        • 2.Se6#
        • 2.Qf7#
      • 1...Rh6
        • 2.Se6#
        • 2.Qf7#
      • 1...Re7
        • 2.dxe7#
      • 1...Rf7
        • 2.Se6#
        • 2.Qxf7#
      • 1...Rh8
        • 2.Se6#
        • 2.Qf7#
      • 1...Rxd7+!
  • Keys
    • 1.Se5!
      • 1...Rxd7+
        • 2.Sxd7#
      • 1...Rg7
        • 2.Qe8#
      • 1...Rh1
        • 2.Qf7#
      • 1...Rh2
        • 2.Qf7#
      • 1...Rh3
        • 2.Qf7#
      • 1...Rh4
        • 2.Qf7#
      • 1...Rh5
        • 2.Qf7#
      • 1...Rh6
        • 2.Qf7#
      • 1...Re7
        • 2.dxe7#
      • 1...Rf7
        • 2.Qxf7#
      • 1...Rh8
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);SBLOCK::QAR1(B)
        • R(a);OGATE::P(A),XR(a)
      • Refutation
        • R(a);CHECK,XB(C)
  • Actual
    • S(D);
    • Vars
      • R(a);CHECK,XB(C)::S(D),XR(a)
      • R(a);SBLOCK::QAR1(B)
      • R(a);N_GUARD::QAR1(B)
      • R(a);OGATE::P(A),XR(a)
      • R(a);N_GUARD::QAR1(B),XR(a)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).